#1**+1 **

The quadratic formula is :

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\) b^2 - 4ac is the discriminant

IF discriminant = 0 =====> only one root (double root)

IF discriminat < 0 only imaginary roots

IF discriminat > 0 two roots

Guest Mar 15, 2022

#3**+2 **

YOU need to work out the ' full answers '

I'll do example one....you do the rest

a = 7 b = - 9 c = 0

discriminant b^2 - 4ac =

(-9)^2 - 4 (7)(0) = 81 this is > 0 there will be two solutions

Now , if you cannot do the others, you are in a math class which is above your level of understanding/knowlwedge and you need some remedial work ...or studying of your class materials.

We are not her to "GIVE" you ANSWERS for the most part....just here to HELP YOU learn the math methods to do it yourself . ~EP

ElectricPavlov
Mar 15, 2022